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by MadRhino
Jul 25 2020 9:33am
Forum: E-Bike General Discussion
Topic: Advice on new battery for long term use (Samsung 50E 52V setup)
Replies: 16
Views: 465

Re: Advice on new battery for long term use (Samsung 50E 52V setup)

‘Long term use’ is not best achieved with LiCo chemistry. There are batteries that last much longer, at the cost of extra size and weight. LiCo was made for high power and/or compact size requirements, at the cost of short life and higher risk of fire or explosion.
by MadRhino
Jul 25 2020 9:10am
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 140
Views: 3340

Re: I need help, as i dont have anywhere to ask, and no one to help me

Sensored controllers are receiving a signal from the motor’s rotation positioning, for each of the 3 phases of the cycle, hence the additional 5 small wires. That is giving them immediate, ‘hard’ start. Sensorless does rely on reading the return of the phases power wires, so the motor needs to start...
by MadRhino
Jul 25 2020 8:49am
Forum: E-Bike General Discussion
Topic: Screw terminals left exposed?
Replies: 1
Views: 115

Re: Screw terminals left exposed?

Those controllers were never meant to be left exposed. If so, you can use Zip seal n’peel caulking, to easily access the connections when needed.
by MadRhino
Jul 24 2020 10:29pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2104

Re: Why fat tires on a street ebike?

Get one used from the motorcycle scrapyards in the meantime. Maybe on ebay. It is shipping that is slow and expansive right now. Distributers are low in stock because they don’t want to pay the shipping cost to refill their inventory.
by MadRhino
Jul 24 2020 10:16pm
Forum: E-Bike General Discussion
Topic: Mechanics in Seattle/Dropout Filing
Replies: 38
Views: 891

Re: Mechanics in Seattle/Dropout Filing

I agree that hollow axles are a weak point that should be avoided in the design of hub motors. Or use a large-diameter thickwalled "pipe" axle, whcih could then carry the wires thru it with plenty of room to spare and still be strong...it wouldn't use axle flats to transmit torque. But it also woul...
by MadRhino
Jul 24 2020 10:08pm
Forum: E-Bike General Discussion
Topic: Why no V-brakes on Fat Bikes?
Replies: 32
Views: 829

Re: Why no V-brakes on Fat Bikes?

Fatbike are made to ride the snow. Winter conditions are the worst for rim brakes reliability. The speed that fat bikes are made for wouldn’t require disc brakes, but the conditions they are riding does. Add to this fact that fat bike specific rim brakes would have needed to be manufactured, while d...
by MadRhino
Jul 24 2020 9:52pm
Forum: E-Bike General Discussion
Topic: Mechanics in Seattle/Dropout Filing
Replies: 38
Views: 891

Re: Mechanics in Seattle/Dropout Filing

A torque arm is enough in many case, and better used alone. I mean, it is very likely that a double torque arms installation has a slight difference of alignment, simply because it is difficult to attach them to the frame with reliable precision. Thus torque is applied to one of them first and force...
by MadRhino
Jul 24 2020 7:58pm
Forum: E-Bike General Discussion
Topic: Mechanics in Seattle/Dropout Filing
Replies: 38
Views: 891

Re: Mechanics in Seattle/Dropout Filing

That is very strong, stronger that I usually make but, you know you need to make both sides, right? Otherwise, you risk axle twisting and eventually, wheel misalignment due to the weakness of the other side. Well, depending of the power of course. That is how I like to do. Lighter (1/4’’ thick), wit...
by MadRhino
Jul 23 2020 10:11pm
Forum: E-Bike General Discussion
Topic: Busted a bike
Replies: 34
Views: 1052

Re: Busted a bike

i like gold, spent quite a few years mining. if youre in gold country people prefer gold over cash... Keeping some gold for the bad days is a wise habit. This bad year especially, is going to triple the price we paid for it. :D Then buy some land, that is much safer and profitable than any bank. A ...
by MadRhino
Jul 23 2020 9:53pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2104

Re: Why fat tires on a street ebike?

I wouldn’t ride a Schwaalbe Marathon if it was the only tire available. They are freaking dangerous on a fast bike because of their hard gum that is closer to nylon than rubber. There are good bicycle tires, as well as bad motorcycle tires. And many bicycle tires have better grip than most motorcycl...
by MadRhino
Jul 23 2020 8:30pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 140
Views: 3340

Re: I need help, as i dont have anywhere to ask, and no one to help me

E-HP wrote:
Jul 23 2020 8:25pm

Ahhh thanks. That makes sense. :thumb:
Especially when working with electricity. :D
by MadRhino
Jul 23 2020 8:21pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2104

Re: Why fat tires on a street ebike?

Going fast, need motorcycle/moped grade tires and rims and enough power to throttle past the flakes I have heard this myth before. The downhill world record is 227 kmh down a rocky volcano, on bicycle tires. I never ride more than half of that in town. The only time in my life that I have had a tir...
by MadRhino
Jul 23 2020 8:01pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 140
Views: 3340

Re: I need help, as i dont have anywhere to ask, and no one to help me

E-HP wrote:
Jul 23 2020 7:54pm
OK, I guess I'm the only one that doesn't know that "wolt" means. Can someone help?
Work
by MadRhino
Jul 23 2020 7:52pm
Forum: E-Bike General Discussion
Topic: Busted a bike
Replies: 34
Views: 1052

Re: Busted a bike

There is a coin shortage, people arent going to stores as they used to and when they do they use tap and pay credit/debit cards. https://www.youtube.com/watch?v=0bY5ziy2XDE Funny This won’t happen to me. I never used credit in my entire life. I don’t even do business at all with banks. My grandfath...
by MadRhino
Jul 23 2020 6:21pm
Forum: E-Bike General Discussion
Topic: I need help, as i dont have anywhere to ask, and no one to help me
Replies: 140
Views: 3340

Re: I need help, as i dont have anywhere to ask, and no one to help me

Well, it is Chinese. Even some screws from China are not Metric, neither Imperial, they are... Chinese. :mrgreen:

I was born a farmer, studied veterinary med, and worked all my life building stone masonry. Ebikes was something I had to learn when I started building my first.
by MadRhino
Jul 23 2020 6:01pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

The small motor of your power steering system is governed by a controller that feeds it the power required by the signal. When it is not spinning, it is not stalled, but stopped by the controller that is not feeding it anymore.
by MadRhino
Jul 23 2020 5:52pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

So, without weights how is it that the user will be able to generate electricity via a motor while maintaining the feel of say 200 pounds worth of weight? I don't see how this is possible. You adjust the restriction via Amp demand to the motor, just like regen braking. The force deployed by the use...
by MadRhino
Jul 23 2020 2:27pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

The only good reason to use a motor for the purpose of a workout machine, is to convert the energy deployed by the user of the machine, to produce electricity. :D
by MadRhino
Jul 23 2020 2:23pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

This is true and practical with any other force. Most of workout machines are working against the force of gravity. Some even use magnetic force already. Some are using force of inertia, etc..
by MadRhino
Jul 23 2020 2:17pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

A hint?
The magnets don’t have to be fixed. They can be moved with the action of the machine, and the distance of other magnets or ferrous metal can be adjusted to create and vary a linear or progressive resistance to movement.
by MadRhino
Jul 23 2020 2:04pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

An electric motor does convert energy to force and movement, and its efficiency determines a part of energy that is lost (converted to heat). If there is no movement it does convert energy to force only, very inefficiently thus most of the energy is converted to heat. The movement and force of a mot...
by MadRhino
Jul 23 2020 12:34pm
Forum: E-Bike General Discussion
Topic: High torque motor at 0rpm (stalled)
Replies: 19
Views: 572

Re: High torque motor at 0rpm (stalled)

You mean you plan to workout against the motor and never let it spin? No way. You need the differential and gears because a motor need to spin, otherwise it is only building heat. There are ways to avoid the differential and gears yet letting the motor spin, but no way you can keep it stalled. And, ...
by MadRhino
Jul 23 2020 12:11pm
Forum: E-Bike General Discussion
Topic: Why fat tires on a street ebike?
Replies: 81
Views: 2104

Re: Why fat tires on a street ebike?

Handling can’t be judged in a straight line. It is in aggressive maneuvers and fast turns that a bike’s handling shows. Then, tires are not the only factor. Suspension tuning and geometry are for a big part of handling quality of a bike. Tune the best with the wheels that you have, then you will no...
by MadRhino
Jul 23 2020 10:39am
Forum: E-Bike General Discussion
Topic: Newb questions about 1st ebike build ??
Replies: 34
Views: 712

Re: Newb questions about 1st ebike build ??

Yep, and every build suits someone's requirements.
by MadRhino
Jul 23 2020 9:07am
Forum: E-Bike General Discussion
Topic: Newb questions about 1st ebike build ??
Replies: 34
Views: 712

Re: Newb questions about 1st ebike build ??

forcefed wrote:
Jul 23 2020 9:01am

I can't imagine doing throttle only with a 3kw cyclone, a bit too much twist and you're flying lol
Maybe you feel that you are more precise with your feet?

3kw is lame for many here, who would not even think about controlling the power of their bike with PAS.